A thin, highly flexible aluminized fiberglass heat shielding material; shields up to 350°F (177°C).

Material Specification: 1214

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WARNING: Raw materials are not sold separately, please contact the sales department for any special requirements.


  • Fiberglass cloth with reflective aluminum surface on one side
  • Fire retardant and SAE tested for automotive applications
  • Meets Mil-C-24929A

The ALS-5 material is highly flexible due to being only 0.006” thick, and engineered for smaller diameter components. The aluminized fiberglass cloth is intended for applications that are exposed to continuous temperatures as high as 350°F (177°C), with handling short bursts of temperatures as high as 572°F (300°C). The ALS-5 pairs well with an adhesive, high-temperature zipper, or Kevlar thread closure to provide complete, 360-degree heat shielding or custom components that need partial protection. ALS-5 works perfectly for automotive applications such as under-the-hood wiring because of the high-temperature capabilities, lightweight composition, and meeting the SAE J2302 requirements for Thermal Effectiveness.


  • Weight: 5.3 oz/sq-yd; ASTM D5041
  • Break Strength: 100 lbs/min (warp) | 50 lbs/min (fill)
  • Thickness: 0.006"
  • Radiant Reflectivity: 10 seconds; Mil-C-24929A
  • Maximum Operating Temperature: 350°F
  • Minimum Operating Temperature: -58°F
  • Shelf Life: 60 Months
  • Tear Strength: 2.0 lbs/min (warp) | 2.0 lbs/min (fill)
  • Specifications subject to change without notice. All statements and technical information contained herein are based on tests we believe to be reliable, but the accuracy or completeness is not guaranteed under all circumstances. Before using Zippertubing® products, the user shall determine suitability for the intended use, and user assumes all responsibility for improper selection. Published attenuation values of Zippertubing® shielding have been verified by laboratory testing of the respective shielding materials. Actual installed attenuation values may differ due to installation techniques and final assembly operation parameters which are beyond the control of Zippertubing®. Actual attenuation values can only be determined by the end user testing the completed assembly. U.S. and International Patents and patents pending. © The Zippertubing® Company, Chandler, Arizona.

    Similar Materials

    ALP-500 ALK-19 ALSR-15
    NAME ALP-500 ALK-19 ALSR-15
    DESCRIPTION Aluminized Fiberglass Heat Barrier, Up To 180°C High Strength Heat Reflective Woven Kevlar Fabric, Up to 177°C Mil-Spec Aluminized Silicone Coated Fiberglass, Up to 260°C
    RoHS RoHS-11
    Abrasion Resistance Best Good Better
    Min Temperature Extreme Extreme Extreme
    Minimum Operating Temperature -58°F -321°F -67°F
    Max Temperature Moderate Moderate Extreme
    Maximum Operating Temperature 350°F 350°F 500°F
    Flexibility Better Best Best
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